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STEM奇妙科学课 Season 1 Episode 9 奔跑的声音 2019

什么样的波动叫做“声波”呢?声波不仅能在空气中奔跑,其实它在水里、墙壁里还有坚硬的土地里跑得更快!一起来做个“传话筒”,让声音“跑”起来。

  • 发布日期: 2019-11-05
  •   运行时间 : 60 分钟
  •   类型 : 动画, 儿童
  •   明星 :
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